diff nuc-fw/nucleus/mbf.c @ 79:947b1f473960

beginning of nuc-fw
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Sun, 11 Aug 2013 07:17:25 +0000
parents
children
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nuc-fw/nucleus/mbf.c	Sun Aug 11 07:17:25 2013 +0000
@@ -0,0 +1,374 @@
+/*************************************************************************/
+/*                                                                       */
+/*               Copyright Mentor Graphics Corporation 2002              */
+/*                         All Rights Reserved.                          */
+/*                                                                       */
+/* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS  */
+/* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS   */
+/* SUBJECT TO LICENSE TERMS.                                             */
+/*                                                                       */
+/*************************************************************************/
+
+/*************************************************************************/
+/*                                                                       */
+/* FILE NAME                                               VERSION       */
+/*                                                                       */
+/*      mbf.c                                          Nucleus PLUS 1.14 */
+/*                                                                       */
+/* COMPONENT                                                             */
+/*                                                                       */
+/*      MB - Mailbox Management                                          */
+/*                                                                       */
+/* DESCRIPTION                                                           */
+/*                                                                       */
+/*      This file contains routines to obtain facts about the Mailbox    */
+/*      management component.                                            */
+/*                                                                       */
+/* DATA STRUCTURES                                                       */
+/*                                                                       */
+/*      None                                                             */
+/*                                                                       */
+/* FUNCTIONS                                                             */
+/*                                                                       */
+/*      MBF_Established_Mailboxes           Number of created mailboxes  */
+/*      MBF_Mailbox_Pointers                Build mailbox pointer list   */
+/*      MBF_Mailbox_Information             Retrieve mailbox information */
+/*                                                                       */
+/* DEPENDENCIES                                                          */
+/*                                                                       */
+/*      cs_extr.h                           Common Service functions     */
+/*      tc_extr.h                           Thread Control functions     */
+/*      mb_extr.h                           Mailbox functions            */
+/*      hi_extr.h                           History functions            */
+/*                                                                       */
+/* HISTORY                                                               */
+/*                                                                       */
+/*         DATE                    REMARKS                               */
+/*                                                                       */
+/*      03-01-1994      Initial version of mailbox fact                  */
+/*                      service file, version 1.1                        */
+/*                                                                       */
+/*      03-18-1994      Verified version 1.1                             */
+/*      04-17-1996      updated to version 1.2                           */
+/*      11-18-1996      Protected Informational service                  */
+/*                      from NULL Control Block pointers                 */
+/*                      creating 1.2a. (SPR220)                          */
+/*      03-24-1998      Released version 1.3                             */
+/*      03-26-1999      Released 1.11m (new release                      */
+/*                        numbering scheme)                              */
+/*      04-17-2002      Released version 1.13m                           */
+/*      11-07-2002      Released version 1.14                            */
+/*************************************************************************/
+#define         NU_SOURCE_FILE
+
+
+#include        "cs_extr.h"                 /* Common service functions  */
+#include        "tc_extr.h"                 /* Thread control functions  */
+#include        "mb_extr.h"                 /* Mailbox functions         */
+#include        "hi_extr.h"                 /* History functions         */
+
+
+/* Define external inner-component global data references.  */
+
+extern CS_NODE         *MBD_Created_Mailboxes_List;
+extern UNSIGNED         MBD_Total_Mailboxes;
+extern TC_PROTECT       MBD_List_Protect;
+
+
+/* Define internal component function prototypes.  */
+
+VOID    MBC_Cleanup(VOID *information);
+
+
+/*************************************************************************/
+/*                                                                       */
+/* FUNCTION                                                              */
+/*                                                                       */
+/*      MBF_Established_Mailboxes                                        */
+/*                                                                       */
+/* DESCRIPTION                                                           */
+/*                                                                       */
+/*      This function returns the current number of established          */
+/*      mailboxes.  Mailboxes previously deleted are no longer           */
+/*      considered established.                                          */
+/*                                                                       */
+/* CALLED BY                                                             */
+/*                                                                       */
+/*      Application                                                      */
+/*                                                                       */
+/* CALLS                                                                 */
+/*                                                                       */
+/*      [TCT_Check_Stack]                   Stack checking function      */
+/*                                                                       */
+/* INPUTS                                                                */
+/*                                                                       */
+/*      None                                                             */
+/*                                                                       */
+/* OUTPUTS                                                               */
+/*                                                                       */
+/*      MBD_Total_Mailboxes                 Number of established        */
+/*                                            mailboxes                  */
+/*                                                                       */
+/* HISTORY                                                               */
+/*                                                                       */
+/*         DATE                    REMARKS                               */
+/*                                                                       */
+/*      03-01-1993      Created initial version 1.0                      */
+/*      04-19-1993      Verified version 1.0                             */
+/*                                                                       */
+/*************************************************************************/
+UNSIGNED  MBF_Established_Mailboxes(VOID)
+{
+
+
+#ifdef  NU_ENABLE_STACK_CHECK
+
+    /* Call stack checking function to check for an overflow condition.  */
+    TCT_Check_Stack();
+
+#endif
+
+    /* Return the number of established mailboxes.  */
+    return(MBD_Total_Mailboxes);
+}
+
+
+/*************************************************************************/
+/*                                                                       */
+/* FUNCTION                                                              */
+/*                                                                       */
+/*      MBF_Mailbox_Pointers                                             */
+/*                                                                       */
+/* DESCRIPTION                                                           */
+/*                                                                       */
+/*      This function builds a list of mailbox pointers, starting at the */
+/*      specified location.  The number of mailbox pointers placed in    */
+/*      the list is equivalent to the total number of mailboxes or the   */
+/*      maximum number of pointers specified in the call.                */
+/*                                                                       */
+/* CALLED BY                                                             */
+/*                                                                       */
+/*      Application                                                      */
+/*                                                                       */
+/* CALLS                                                                 */
+/*                                                                       */
+/*      [TCT_Check_Stack]                   Stack checking function      */
+/*      TCT_Protect                         Protect created list         */
+/*      TCT_Unprotect                       Release protection           */
+/*                                                                       */
+/* INPUTS                                                                */
+/*                                                                       */
+/*      pointer_list                        Pointer to the list area     */
+/*      maximum_pointers                    Maximum number of pointers   */
+/*                                                                       */
+/* OUTPUTS                                                               */
+/*                                                                       */
+/*      pointers                            Number of mailboxes placed   */
+/*                                            in the list                */
+/* HISTORY                                                               */
+/*                                                                       */
+/*         DATE                    REMARKS                               */
+/*                                                                       */
+/*      03-01-1993      Created initial version 1.0                      */
+/*      04-19-1993      Verified version 1.0                             */
+/*      08-09-1993      Corrected pointer retrieval                      */
+/*                      loop, resulting in version 1.0a                  */
+/*      08-09-1993      Verified version 1.0a                            */
+/*      03-01-1994      Changed function interface to                    */
+/*                      match the prototype,                             */
+/*                      resulting in version 1.1                         */
+/*                                                                       */
+/*      03-18-1994      Verified version 1.1                             */
+/*                                                                       */
+/*************************************************************************/
+UNSIGNED  MBF_Mailbox_Pointers(NU_MAILBOX **pointer_list,
+                                                UNSIGNED maximum_pointers)
+{
+CS_NODE         *node_ptr;                  /* Pointer to each MCB       */
+UNSIGNED         pointers;                  /* Number of pointers in list*/
+NU_SUPERV_USER_VARIABLES
+
+    /* Switch to supervisor mode */
+    NU_SUPERVISOR_MODE();
+
+#ifdef  NU_ENABLE_STACK_CHECK
+
+    /* Call stack checking function to check for an overflow condition.  */
+    TCT_Check_Stack();
+
+#endif
+
+    /* Initialize the number of pointers returned.  */
+    pointers =  0;
+
+    /* Protect against access to the list of created mailboxes.  */
+    TCT_Protect(&MBD_List_Protect);
+
+    /* Loop until all mailbox pointers are in the list or until the maximum
+       list size is reached.  */
+    node_ptr =  MBD_Created_Mailboxes_List;
+    while ((node_ptr) && (pointers < maximum_pointers))
+    {
+
+        /* Place the node into the destination list.  */
+        *pointer_list++ =  (NU_MAILBOX *) node_ptr;
+
+        /* Increment the pointers variable.  */
+        pointers++;
+
+        /* Position the node pointer to the next node.  */
+        node_ptr =  node_ptr -> cs_next;
+
+        /* Determine if the pointer is at the head of the list.  */
+        if (node_ptr == MBD_Created_Mailboxes_List)
+
+            /* The list search is complete.  */
+            node_ptr =  NU_NULL;
+    }
+
+    /* Release protection against access to the list of created mailboxes.  */
+    TCT_Unprotect();
+
+    /* Return to user mode */
+    NU_USER_MODE();
+
+    /* Return the number of pointers in the list.  */
+    return(pointers);
+}
+
+
+/*************************************************************************/
+/*                                                                       */
+/* FUNCTION                                                              */
+/*                                                                       */
+/*      MBF_Mailbox_Information                                          */
+/*                                                                       */
+/* DESCRIPTION                                                           */
+/*                                                                       */
+/*      This function returns information about the specified mailbox.   */
+/*      However, if the supplied mailbox pointer is invalid, the         */
+/*      function simply returns an error status.                         */
+/*                                                                       */
+/* CALLED BY                                                             */
+/*                                                                       */
+/*      Application                                                      */
+/*                                                                       */
+/* CALLS                                                                 */
+/*                                                                       */
+/*      [TCT_Check_Stack]                   Stack checking function      */
+/*      TCT_System_Protect                  Protect mailbox              */
+/*      TCT_Unprotect                       Release protection           */
+/*                                                                       */
+/* INPUTS                                                                */
+/*                                                                       */
+/*      mailbox_ptr                         Pointer to the mailbox       */
+/*      name                                Destination for the name     */
+/*      suspend_type                        Destination for the type of  */
+/*                                            suspension                 */
+/*      message_present                     Destination for the message  */
+/*                                            present flag               */
+/*      tasks_waiting                       Destination for the tasks    */
+/*                                            waiting count              */
+/*      first_task                          Destination for the pointer  */
+/*                                            to the first task waiting  */
+/*                                                                       */
+/* OUTPUTS                                                               */
+/*                                                                       */
+/*      NU_SUCCESS                          If a valid mailbox pointer   */
+/*                                            is supplied                */
+/*      NU_INVALID_MAILBOX                  If mailbox pointer invalid   */
+/*                                                                       */
+/* HISTORY                                                               */
+/*                                                                       */
+/*         DATE                    REMARKS                               */
+/*                                                                       */
+/*      03-01-1993      Created initial version 1.0                      */
+/*      04-19-1993      Verified version 1.0                             */
+/*      03-01-1994      Changed function interface to                    */
+/*                      match the prototype,                             */
+/*                      resulting in version 1.1                         */
+/*                                                                       */
+/*      03-18-1994      Verified version 1.1                             */
+/*      11-18-1996      Corrected SPR220.                                */
+/*                                                                       */
+/*************************************************************************/
+STATUS  MBF_Mailbox_Information(NU_MAILBOX *mailbox_ptr, CHAR *name,
+                  OPTION *suspend_type, DATA_ELEMENT *message_present,
+                  UNSIGNED *tasks_waiting, NU_TASK **first_task)
+{
+
+MB_MCB         *mailbox;                    /* Mailbox control block ptr */
+int             i;                          /* Working integer variable  */
+STATUS          completion;                 /* Completion status         */
+NU_SUPERV_USER_VARIABLES
+
+    /* Switch to supervisor mode */
+    NU_SUPERVISOR_MODE();
+
+    /* Move input mailbox pointer into internal pointer.  */
+    mailbox =  (MB_MCB *) mailbox_ptr;
+
+
+#ifdef  NU_ENABLE_STACK_CHECK
+
+    /* Call stack checking function to check for an overflow condition.  */
+    TCT_Check_Stack();
+
+#endif
+
+    /* Determine if this mailbox id is valid.  */
+    if ((mailbox != NU_NULL) && (mailbox -> mb_id == MB_MAILBOX_ID))
+    {
+
+        /* Setup protection of the mailbox.  */
+        TCT_System_Protect();
+
+        /* The mailbox pointer is valid.  Reflect this in the completion
+           status and fill in the actual information.  */
+        completion =  NU_SUCCESS;
+
+        /* Copy the mailbox's name.  */
+        for (i = 0; i < NU_MAX_NAME; i++)
+            *name++ =  mailbox -> mb_name[i];
+
+        /* Determine the suspension type.  */
+        if (mailbox -> mb_fifo_suspend)
+            *suspend_type =          NU_FIFO;
+        else
+            *suspend_type =          NU_PRIORITY;
+
+        /* Indicate whether or not there is a message in the mailbox.  */
+        *message_present =  mailbox -> mb_message_present;
+
+        /* Retrieve the number of tasks waiting and the pointer to the
+           first task waiting.  */
+        *tasks_waiting =  mailbox -> mb_tasks_waiting;
+        if (mailbox -> mb_suspension_list)
+
+            /* There is a task waiting.  */
+            *first_task = (NU_TASK *)
+                (mailbox -> mb_suspension_list) -> mb_suspended_task;
+        else
+
+            /* There are no tasks waiting.  */
+            *first_task =  NU_NULL;
+
+        /* Release protection.  */
+        TCT_Unprotect();
+    }
+    else
+
+        /* Indicate that the mailbox pointer is invalid.   */
+        completion =  NU_INVALID_MAILBOX;
+
+    /* Return to user mode */
+    NU_USER_MODE();
+
+    /* Return the appropriate completion status.  */
+    return(completion);
+}
+
+
+
+
+